Eraser-tip for lead-pencils.



PATENTED MAY 21, 1907. B. B. GOLDSMITH. I ERASER TIP FOR LEAD PENGILS.

APPLICATION FILED JAN.15, 1904. RENEWED JAN. 30, 1907.

"7476 WWW BYRON B. GOLDSMITH, OF NEW YORK, N. Y.

ERASER-TIP FOR LEAD-PENCILS.

Specification of Letters Patent.

Patented May 21, 1907.

Application filed January 15, I904. Renewed January 30, 1907. Serial 354,912.

To all whom it may concern.-

Be it known that I, BYRON B. GOLDSMITH, a citizen of the United States, and aresident of New York, in the county and State of New York, have invented certain new and useful Improvements in Eraser-Tips for Lead-Pencils, of which the following is a specificationv My invention has reference to improvements in lead pencil tips or ferrules, adapted to hold an eraser or other article of utility. These pencil tips are either permanently fixed to the butt end of the lead pencil, in which case they would serve solely the purpose of holding an article of utility, such, for instance, as an eraser; or the tips are made removable, so that they may be taken from the butt end of the pencil and slipped over the pointed end, and thus serve as a point protector, and if so constructed they may either hold an eraser or other article of utility.

Erasers are commonly attached to pencils by means of a small cylindrical piece of metal, known as the tip, and into which the rubber is stuck as tightly as practicable. But experience has shown that in use the rubber Works loose and is often lost long before the pencil is used up. In additionto this, the rubber usually extends and must extend about two thirds of its length into the metal tip, so that only about one third of the length of the rubber is available for use. By my invention, these disadvantages are overcome. With the construction which I employ the erasercannot possibly be lost; it cannot work loose in the tip and only a very small part of the rubber material is hidden. The amount thus hidden can bemade exceedingly small,

so that with a piece of rubber of the weight or bulk generally used in pencil tips, the user gets about three times as much actual erasing material, or the manufacturer need use only about one third of the rubber ordinarily employed and still give the consumer as much available erasing material as he gets by the old practice.

In the accompanying drawing, which forms a part of this specification, my invention is illustrated as follows:

Figure 1 is an elevation of my improved rubber-holding lead pencil tip, partly shown in longitudinal section and Fig. 2 is a like view, of the upper end of a modified form of my improved pencil tip.

Like numerals of reference indicate like parts throughout the drawing.

In Fig. 1, the pencil tip is shown as a ferover the point to protect the latter, whenthe pencil is not in use; and this is the position in which the tips are shown in the drawing, the body of the lead-pencil being marked by the numeral 3, and the graphite portion by the numeral 4. The ferrule is contracted at its outer end into a neck 5. The metal cup 6 has a perforation in its base through which it is slipped over the neck of the ferrule, whereupon the cup is permanently secured to the ferrule in some suitable way. This metal cup may be a skeleton frame formed with a number of prongs, as shown in Fig. 1, or may be a solid shell, as shown in Fig. 2. The cup 6, may be permanently secured to the neck 5 in the manner indicated in the drawing. The neck 5 is shown extended far into the cup and terminates in a thimble 5, and in this case the cup is held upon the neck between the bead or shoulder 8, primarily formed on the neck, and the expansion 8, formed by means of a suitable tool after the cup has been passed over the thimble and seated upon the bead or shoulder 8. In Fig. 2 the neck 5 is shown as passing only a short distance into the cup, and not as a thimble, but as an open tube, and in this case the cup is permanently secured in place upon the head or shoulder 8, by expanding or heading the edge of the neck outwardly, as indicated in 8".

The cup 6, either in its skeleton form,

shown in Fig. 1 or in its solid form, shown in Fig. 2, is mainly designed to receive and se curely clamp an eraser or some article of utility. In Fig. 1, the construction shown is particularly adapted for holding an eraser 9, the general form of which may be that of an acorn, with its base seated in the cup, and with the thimble extension 5 of the neck 5, entering an axial perforation or recess in the eraser. The points of the prongs 7 are bent over the ledge at the junction of the reduced part of the acorn-shaped eraser with the swelled base thereof, and thus the eraser is securely clamped circumferentially, while it is held axially on the thimble 5. Preferably, but not necessarily, the points of the prongs 7, are formed as teeth 7 which bite into the material of the eraser.

IIO

The acorn shape of the eraser is merely fanciful, since any other form may be given to it, nor is a shoulder or ledge necessarily formed on the eraser when the skeleton cup is employed, since in that case the teeth 7 biting into the body of the eraser will sufliciently clamp it in the cup. Although the axial support of the eraser shown in Fig. 1 adds to the security of the grip of the cup upon the eraser, it is by no means indispensable.

Having now fully described my invention, I claim and desire to secure by Letters Patent:

1. An eraser tip for lead pencils comprising a ferrule for embracing the end of the lead pencil, a cup-shaped receptacle having a perforation in its base through which it is slipped upon and permanently secured to one end of said ferrule, and a block of erasive material seated in said cup-shaped receptacle and clamped in place therein by having the circumferential edges of the receptacle bent inwardly upon the block, substantially as described.

2. An eraser tip for lead pencils comprising a ferrule for embracing the end. of the lead pencil having one end contracted into a neck, a cup-shaped receptacle having a perforation in its base through which it is slipped upon and permanently secured to the neck, and a block of erasive material seated in said cup-shaped receptacle and clamped in place therein by having the circumferential edges of the receptacle bent inwardly upon the block, substantially as described.

3. As an article of manufacture, a ferrule adapted to embrace either the pointed or butt end of a lead pencil, and having one end reduced and provided with an annular shoulder; a cup shaped receptacle applied to said reduced end so as to abut against the annular shoulder; and an expanded portion of the ferrule clamping the said cup shaped receptacle to the annular shoulder, substantially as described.

4. As an article of manufacture, a ferrule adapted to embrace either the pointed or butt end of the pencil, and having one end reduced and formed into a thimble, at the base of which is an annular shoulder; a cup shaped receptacle passed over the thimble so as to abut against the annular shoulder; and an expanded portion of the thimble clamping the cup shaped receptacle to the shoulder, substantially as described.

5. An eraser tip for lead pencils, comprising a ferrule having one end reduced and formed into a thimble at the base of which is an annular shoulder; a cup shaped receptacle passed over the thimble so as to abut against the shoulder and clamped thereto by an expanded portion of the thimble, a block of erasive material housed in said receptacle; and inturned portions of the rim of the receptacle for holding the erasing block in place, the said block being provided with an axial socket for the reception of the thimble, substantially as described.

In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses.

BYRON B. GOLDSMITH.

Witnesses: i

M. FETzLoFF, F. T. CHAPMAN. 

